469
Participants
Start Date
September 30, 1997
Primary Completion Date
October 31, 2001
Study Completion Date
September 30, 2013
Progressive Addition Lenses
Varilux comfort with +2.00 addition
single vision lenses
University of Alabama-Birmingham, School of Optometry, Birmingham
New England College of Optometry, Boston
Pennsylvania College of Optometry, Philadelphia
University of Houston, College of Optometry, Houston
National Eye Institute (NEI)
NIH
Stony Brook University
OTHER